Oct IS, 1921 Aecial Stooge of the Orange Leaf rust of Wheat 161 



7519, from Southampton, N. Y., collected by H. S. Jackson. 

 8319, from Rocky Ford, Colo., collected by J. G. Leach. 

 10019, from Buffalo, Minn., collected by G. W. Martin. 

 105 19, from Plainview, Nebr., collected by H. W. Thurston. 

 11019, from Vermillion, Minn., collected by G. W. Martin. 

 1 12 19, from Newark, Del., collected by T. F. Manns. 

 Besides the above, the following collections were wintered, but no 

 germinating teliospores were found, and in consequence they were not 



sown. 



1419, from Santa Rosa, Calif., collected by H. S. Jackson. 



3319, from Sonora, Mexico, near Yuma, Ariz., collected by L. Y. 

 Leonard. 



3419, from St. Louis, Mo., collected by E- B. Mains. 



3719, from Jackson, Tenn., collected by Kurtzweil and Thiel. .5 



4019, from Corvallis, Oreg., collected by G. R. Hoemer. ,i 



5519, from St. Paul, Minn., collected by A. F. Thiel. .^ | 



6619, from Hiawatha, Kans., collected by W. H. Ballamy.o\^ | 



6819, from Marshall, Mo., collected by R. S. Kirby. ) n 



6919, from Guthrie, Okla., collected by R. S. Kirby. 



71 19, from Wellington, Mich., collected by G. H. Coons. 



7919, from Nashville, Tenn., collected by C. A. Ludwig. 



91 19, from Madison, Wis., collected by E. B. Mains. 



108 1 9, from Manhattan, Kans., collected by L. E. Melchers. 



Ill 19, from Toledo, Iowa, collected by I. E- Melhus. 



11919, from Fort Collins, Colo., collected by J. G. Leach. 



12019, from East Lansing, Mich., collected by Acelia M. Leach. 



12 1 19, from East Lansing, Mich., collected by Acelia M. Leach. 



12319, from Pullman, Wash., collected by F. D. Heald. 



1 38 1 9, from Fort Collins, Colo., collected by J. G. Leach. 



21019, from Moscow, Idaho, collected by G. R. Hoemer. 



25519, from Murfreesboro, Tenn., collected by Carl Kurtzweil. 



25719, from Clarksville, Tenn., collected by Carl Kurtzweil. 

 The accompanying map (fig. i) shows the source of collections used 

 in the work together with the results obtained with them at La Fayette, 

 Ind. This map shows that material from the States of Pennsylvania, 

 West Virginia, Indiana, Illinois, North Carolina, South Carolina, Georgia, 

 Alabama, Mississippi, Louisiana, and Texas gave germination uniformly 

 and infected Thalictrum in all cases. A region represented by the States 

 of Colorado, Oklahoma, Arkansas, Kansas, Nebraska, Minnesota, Iowa, 

 and Missouri, with one arm running through Wisconsin into Michigan 

 and another through Tennessee into Kentucky, gave material which 

 usually did not germinate or, if germination was obtained, produced 

 infection on Thalictrum in only a few cases. Whether this situation 

 indicates the presence of another strain of the leafrust having different 

 characteristics as regards its viability and power to infect Thalictrum, 

 or whether it means that the season or climate was of such a nature that 



